Mel B will miss the X Factor final through illness and will be replaced by former judge Tulisa Contostavlos, the show has confirmed.
The former Spice Girl will miss the show at Wembley, where her act Italian Andrea Faustini faces Ben Haenow and Fleur East, on doctors orders, a spokesman said.
The pop star, 39, was absent from an X Factor press conference on Thursday.
The spokesman said: "Unfortunately Mel is still unwell and following doctors' advice she will not be taking part in Saturday's show. Tulisa will join the panel as a guest judge."
As well as the final three acts, the shows - which include the results show tomorrow - will also feature Ed Sheeran, Sam Smith, One Direction, Meghan Trainor, Olly Murs and Demi Lovato.